diff options
Diffstat (limited to 'deps/v8/src/scopes.h')
| -rw-r--r-- | deps/v8/src/scopes.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/deps/v8/src/scopes.h b/deps/v8/src/scopes.h index 09901ade61..a9220eb827 100644 --- a/deps/v8/src/scopes.h +++ b/deps/v8/src/scopes.h @@ -289,6 +289,17 @@ class Scope: public ZoneObject { int ContextChainLength(Scope* scope); // --------------------------------------------------------------------------- + // Strict mode support. + bool IsDeclared(Handle<String> name) { + // During formal parameter list parsing the scope only contains + // two variables inserted at initialization: "this" and "arguments". + // "this" is an invalid parameter name and "arguments" is invalid parameter + // name in strict mode. Therefore looking up with the map which includes + // "this" and "arguments" in addition to all formal parameters is safe. + return variables_.Lookup(name) != NULL; + } + + // --------------------------------------------------------------------------- // Debugging. #ifdef DEBUG |